<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <script src="d3.js"></script>
  <script src="colors.js"></script>
</head>

<body>  
  <div>
    <svg id="scale" width="400" height="350" style="background:lightgrey" />
  </div>
  
  <div>
    <canvas id="canvas" width="465" height="250" style="background:lightgrey" />
  </div>

  <div>
    <svg id="contours" width="600" height="300" style="background:lightgrey" />
  </div>
</body>
</html>
